## Yes ##

It’s a spell of 4th level or lower so it meets the only criteria. Indeed the optimum choice is to cast it at 4th level.

A spell can be “cast ... on the guardian” even if the normal targeting and triggering conditions were not met. For example, you can store a *Fireball* even though it targets a point in space or a *Shield* even though it targets you and requires you to be hit by an attack or magic missile.

Unlike *Glyph of Warding*, the effect does not limit the spells that can be stored except by level.

**In the alternative ...**

You can’t. Nor can you store any area of effect spell or a spell that targets “you” or a spell with multiple targets.